I think bitcoin will not replace the bank because Bitcoin is the first non-centralized digital currency,Like money in general, Bitcoin can be used to store wealth and to purchase goods electronically,While banks regulate the circulation of money such as the euro and the dollar..
Yeah youre right and i must prepared for bitcoin because I know bitcoin without an interest and the value is always grow.Unlike from bank account that they have interest and your money will not grow just only for savings account.